Improvement in fire-boxes for stoves, ranges, and furnaces



Shee s-"Sh eet 2. P. N. B U R K E.

FIRE-BOX FOR STOVES, RANGES, AND FURNACES. N o 181,634. 4 Patented. Aug. 29, 1376.

I ATTORNEYS- N. PETERS, PHOTO-UTNOGRAPHER. WASHINGTON. D 04 warns FFIGE.

PATENT PETER N. BURKE, OF NEW YORK, N. Y.

Specificationformin g part of Letters Patent No. 181,634, dated August 29, 1876 application filed April 21,1875.

To all whom it may concern:

Be it known that I, PETER N. BURKE, of New York, in the county of New York and State. of New York, have invented a new and valuable Improvement in Fire-Boxes for Stoves, Ranges, and Furnaces; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being bad to the annexed drawings, making apart of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a representation of a longitudinal vertical section of my firebox, and Fig. 2 is a horizontal sectional view of the same. Fig. 3 is a perspective view.

Thisinvention has relation to tire-boxes or furnaces which are applicable to various kinds of stoves and ranges, and also to furnaces which are designed for steam-generators, melting-cupolas, and for other purposes, as will be hereinafter explained.

In the annexed drawings, A designates the top plate of the stove; A, the bottom plate; B, the front wall; B, the rear-end wall, and (J G the vertical side walls. D designates the oven, the front and rear plates a a of which have rows of perforations b I) through them, of the same size or of different sizes, which allow heated air to circulate through the air passing into the oven D through the perforations b, and escaping from the oven through the perforations b, entering a chamber, c, and thence escaping impregnated with the vapors of cooking into the ash-pit E. F is a valve, which is used for regulating the escape of heated air from the oven into the ash-pit, and also for cutting off the commuut cation, to prevent ashes or dust entering the oven when the poker is used for clearing the grate.

If desired, chamber 0 may be omitted, and the valve F, or its equivalent, applied to the front oven-plate a. The chamber 0 is, however, preferably employed by me, as it is important and essential in cleaning the grate to prevent ashes from entering the oven, if the damper F were partially opened in poking the fire, and applied directly to perforations in the oven.

The front wall B is perforated, as shown in Fig. l at d, for the admission of air into a chamber, 6, from which chamber the air is conducted through passages ff at the ends of the fire-pot Gr. (Shown in Fig. 2.) The air leaves the passages f f, enters a flue, g, and thence passes over the oven, down behind the oven, and through the same, as above described. The air-flues are broad sheet-fines, extending from one side to the other of th stove.

H designates a broad sheet-flue, which extends from the fire-pot G to a vertical flue, H which flue is at the back of the oven, and communicates at its lower end with a horizontal flue, H below the oven, in which latter flue is a deflector, h, around which the heated products pass on their way to an outlet, z', leading into the base of a vertical escape-flue, J. There is also another opening leading from the flue H directly into the escape-flue J, which opening is provided with a damper, j, for cutting off the direct draft.

The inner walls k k of the air-chambersff constitute the end walls of the fire-pot G, and the front of this fire-pot is formed of gratebars l. in front of which is an air-space, m, having a valve, n, on top, and opening into the ash-pit E below. The bottom of the firepot is providedwith a tilting grate, 10, in rear of which are perforations r, for a purpose hereinafter explained.

At the back of the tire-pot is a broad auxiliary combustion-flue, 8, into which air is admitted through itsends. Between this fine 8 and the tire-pot is a chamber, t, bounded in front by perforated fire-bricks k, or thick perforated iron plates, and in rear by a perforated plate, o, the lower end of which forms a supporting-shelf for the fire-brick in front. Air is admitted into the chamber 15 through the ends thereof, and when the air is highly heated it escapes into the tire-pot, and also into the fiue s, and aids in supporting combustion therein. At the back of combustion-flue s is a chamber, w, bounded in front by a perforated fire-brick, m, and in rear by a vertical wall, or. This chamber to is supplied with air through its ends, which air becomes highly heated, and escapes through the fire-brick 00 into the line 8. Air also enters the flue s from the ash-pit through the perforations, and

the air likewise is supplied to the chamber W through perforations win its bottom.

When the damper N, at the upper end of flue s, and the damper n, at the upper end of the air-space m, are opened, as shown in full lines, Fig. 1, the air and products of combustion pass downward through the bed of coals in the fire-pot, and thence up through the flue s, Where a second combustion takes place, OW- ing to the supply of air therein. By these means I am able to successfully burn soft or bituminous coal.

When the dampers N n are shut, the air and combustible products will ascend and escape to the chimney, the damper j being closed through the flues H H H and when the damper j is open, the products of combustion will pass directly to the chimney. Dampers N n may be connected by a rod, P, or they may be operated independently of each other.

What I claim as new, and desire to secure by Letters Patent, is-

1. The auxiliary combustion-flue s, with airopenings in its ends, in combination with the air-space m, fire-box G, and dampers N 11/, substantially as described, and for the purpose set forth.

2. The auxiliary fine 8, provided with airopenings in its side and ends, in combination with the air-chambers t and w, provided with air-openings, air-space m, dampers N n, and fire-box G, substantially as described, and for the purpose set forth.

3. The auxiliary combustion-flue s,provided with air-openings, in combination with the fire-box G, air-chambers t, w, and m, and. hotair flues ff, substantially as described.

4. The auxiliary combustion-cham ber 8, provided with air-openings in its sides and ends, in combination with air-chambers L and W and damper N, substantially as described, as and for the purpose set forth.

5. The chamber 6, intowhich air may be admitted through registers or perforations communicating with the chambers f f, in combination with fire-box G, auxiliary combustion-chamber s, and dampers N a, substantially as and for the purpose set forth. 6. The oven D, having end perforations b b, for the passage of hot air, in combination with the chamber 0, damper F, and ash-pit E, substantiallyas described, and for the purpose set forth. 7 p

7. The flue g, in combination with the auxiliary combustion-chamber s and fire-box G, substantially as described, and for the purpose set forth.

8. The flue g, in combination with the chambers f f and e, auxiliary combustion-chamber s, and fire-box G, substantially as and for the purpose set forth. I

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

PETER N. BURKE.

Witnesses:

D. D. KANE, GEORGE E; UPHAM. 

